A fancy vivid pink diamond that is believed to have been part of the collection of Napoleon Bonaparte’s niece, Princess Mathilde, could fetch up to $18 million when it hits Sotheby’s auction block next month.Dubbed the “Historic Pink Diamond,” the diamond is an 8.72-carat stone, VS2 clarity and is a non-modified cushion cut; unusual for a pink diamond.

Scheduled for May 12 Sotheby’s auction of Magnificent Jewels and Noble Jewels, in Geneva.

Lucara Diamond Corp. announced this week the discovery of a 341.9-carat gem-quality diamond at its Karowe Mine in Botswana, the same mine that yielded two 200-carat-plus pieces of rough last year. The diamond is a Type IIa that shows “exceptional color and clarity”. It will be sold along with two other big pieces of rough, both of which are more than 100 carats. The sale date has yet to be determined.The diamond was found while processing fragmental kimberlite from the central and south lobe interface of the mine, which is proving, somewhat surprisingly, to be a prolific source of high-quality, large rough diamonds.

An anonymous buyer who called in their bid became the owner of one impressive diamonds, a 100.2-carat, internally flawless, D color Type IIa diamond. The diamond sold for $22.1 million at Sotheby’s New York jewelry sale on April 21, falling slightly short of its highest pre-sale estimate, $25 million.The hundred-carat stunner led Tuesday’s Magnificent Jewels sale and was one-third of the auction’s $65.1 million total, a new record for Sotheby’s in New York.According to Sotheby’s, the stone is the largest “perfect” diamond with a classic emerald cut ever sold at auction and the first 100-carat-plus perfect diamond sold at an auction held in New York. The $22 million paid for it is a record for a colorless diamond auctioned in New York.

The “Kimberley Purple,” a 30.80-carat rough diamond found in Batla Minerals’ Superkolong diamond tailings plant in Kimberley, South Africa, is on view in New York until April 23, when it will be moved to Antwerp for tender. A viewing can be arranged by emailing appts@fusionalternatives.com. Additional information on the tender can be found on the Fusion Alternatives website.

Meet the Ultimate Emerald-Cut Diamond. The 100.20 carat D color internally flawless emerald-cut diamond will go up for auction at Sotheby’s, April 21, 2015. The stone originated from a rough diamond weighing over 200 carats, found in southern Africa by De Beers. It took the owner over a year to cut and polish the diamond.

On Nov. 20 a 9.75 ct fancy vivid blue pear-shaped diamond hit the auction block at Sotheby's New York. A frenzied 20 minute bidding war between seven people ensued ending with the stone fetching $3.3 million a carat ($32.6 million total), setting a new record for any diamond's per-carat price sold at auction. The price tops the 14.82 carat vivid orange sold by Christie's in Geneva which sold at $2.3 million a carat ($35.5 million total). The diamond has also set a record as the most expensive diamond ever, a spot previously held by the Wittlesbach-Gaff sold in 2008.The blue has been dubbed "The Zoe" by its current owner, A Hong Kong collector who remains anonymous.

The Christie's November 11th auction shatters the world record for any sapphire sold at an auction with the Blue Belle of Asia fetching a staggering US$17.7 million. The 392.52 carats cushion-cut Ceylon sapphire is the world’s fourth largest faceted blue sapphire and was listed as the second most expensive lot at the sale (estimate $6.9 – 9.9 million), however it soon outperformed the highest estimated lot, colored diamond and diamond ear pendants by Bulgari. The enormous blue sapphire has a provenance dating back to 1937. This is an even larger landmark notice as this was also the first time that a blue sapphire or a colored gemstone lot had been at the top of a public auction and outperformed diamond containing lots.